wat is d difference between stereospecific and stereoselective type of rxns????please give an example also..

4 years ago

Share

Answers : (1)

                                        

Dear unnati


Stereospecific Reaction: One in which one or more reactants or catalysts cause a reaction to take place at specific conformational sites, thus leading to a preferred spatial geometry of the reaction product. Syndiotactic polymers are a result of stereospecific polymerization


For example, the addition of dibromocarbene to cis-2-butene yields cis-2,3-dimethyl-1,1-dibromocyclopropane whereas addition of dibromocarbene to the trans isomer exclusively yields the trans cyclopropane.



stereospecific carbene reaction



Stereoselective Reaction:stereoselectivity is the property of a chemical reaction in which a single reactant forms an unequal mixture of stereoisomers during the non-stereospecific creation of a new stereocenter or during the non-stereospecific transformation of a pre-existing one


An example of modest stereoselectivity is the dehydrohalogenationof 2-iodo-butane which yields 60% trans-2-butene and 20% cis-2-butene. Since alkene geometric isomers are also classified as diastereomers, this reaction would also be called diastereoselective.


Stereoselective dehalogenation

All the best

AKASH GOYAL
AskiitiansExpert-IITD

Please feel free to post as many doubts on our discussion forum as you can. We are all IITians and here to help you in your IIT JEE preparation.


Now you can win exciting gifts by answering the questions on Discussion Forum. So help discuss any query on askiitians forum and become an Elite Expert League askiitian.



4 years ago

Post Your Answer

More Questions On Discuss with colleagues and IITians

Ask Experts

Have any Question? Ask Experts
Post Question
 
Answer ‘n’ Earn
Attractive Gift
Vouchers
To Win!!!
Click Here for details
which college and branch can i get with following rank details details overalll category (GEN) all india 14158 11027 State(raj) 1544 1121 can i get mnit jaipur mechenical, ece, or cs please...
 
 
The link below is IIT JEE Main Branch and College Predictor.You can use it to get the answer to your query. http://www.askiitians.com/iit-jee/main/college-branch-predictor.html Thanks...
  img
Aziz Alam 2 months ago
should i drop out for a year or take admission in HBTI kanpur? (12th appearing)
 
 
If you are considering to take a drop year, then you have to be mentally prepared to go the distance. It’s one year of sheer hard and smart work. On the other hand HBTI Kanpur in...
  img
Aziz Alam 2 months ago
I am a beginner, so should i practice from S.k. goyal- Algebra Or its its a bit high level???
 
 
S.K.Goyal does have a good set of questions and for a beginner it does seems to be a bit tough but if you have the patience , then you should actually sit with it and solve those problems...
  img
Aziz Alam 2 months ago
 
Then from which books should i study to get a good set of questions as a beginner & sir please justify specific names and dont post the link as there are too many books there..........@ AZIZ...
 
Sankalp Tiwari one month ago
sir, is it possible to discontinue m.b.b.s. course from odisha govt. college after 1 year of admission to take m.b.b.s.course in jipmer next year ????
 
 
Hi Yes, it is possible to switch to any college even after 1 year of admission into other college provided you are able to clear the entrance exam and fulfill the criterai for gaining...
  img
Sumreet Johar 2 months ago
i got 183 marks in mains and 98.3% in ap boards can i get nit warangal EEE in any round or which branch can i expect in NITW PLEASE REPLY..
 
 
The cut-off for Nit warangal Is nearly 230. With these marks you won’t ger warangal. You can try to get admission In some reputed colleges like National Institute of Engineering, Mysore...
 
Vivek Kumar 2 months ago
sir my state rank is abt 750... in tamil nadu.. can i get nit trichy under state gota... my air is abt 17k
 
 
Hi, There is a possibility trhat you may get a average branch in NIT Tamil Nadu. For a better predicction you can visit our college and branch predictor. Here is the link :...
  img
Yash Baheti 2 months ago
View all Questions »